During James' first ill-fated private mission, when using the security guard to open the first internal door, they open the door inwards; yet as they walk through, it opens outwards.
After dinner when James and Mike are talking in the basement, the blanket on Mike's chair is about to fall off until the final shots, when it is perfectly laid over the chair.
During the motorcycle chase in the parking lot, different backpacks are used.
In the metro - in one frame he is full of blood, in the other frame he is clean.
An honorably discharged service member cannot lose vested benefits without a lengthy administrative process. James' CO couldn't strip him of those benefits. The whole premise of the movie is fantasy.
During the raid at the lab, the team has call signs such as Fox 3, Coyote 1 and Wolf 2. As they all move together as one unit, they should have the same word followed by 1, 2, 3; for example Wolf 1, Wolf 2, etc. The different call signs indicate that they are different groups within the team, but they are not.
During the opening sequences of the film, Sgt. Harper is seen driving through the access gates of Fort Bragg. After that segment, he is seen jogging down a road and next to a used car dealership bearing a phone number with Area Code '404'. That is a Metro Atlanta area code; Special Forces Personnel never live more than a hour away from their assigned bases.
Poland is part of the Schengen area and there are no permanent border controls between Germany and Poland as depicted towards the end of the movie.
During the job in the research facility the team wears military training helmets (helmets have air holes, so no ballistic protection, unsuitable for this mission)
James is able to run carrying his friend, then swim, then completely unable to stand, then again able to walk as though uninjured.
It is possible but very difficult to tell if an unconscious patient has torn or damaged his ACL without an MRI scan (which is not available at Virgil's safe-house).
At 37:34 the background actor has his rifle with the bolt carrier in the open position and the charging handle is not seated. Really good way to get yourself killed in a gunfight.
When James injects himself, it can be seen that it's a fake syringe; the needle retracts from the syringe.
The wind is heard blowing outside of Virgil's safe-house, yet the branches of the trees seen through the window are perfectly still.
(at around 41 mins) When in the lab, the phone vibrates in Mike's hands, yet it sounds like it is on a hard flat surface.
When they meet Rusty at his ranch, they are at a small lake surrounded by tall hills. Spring Lake, NC doesn't have any hills in the area nearly that tall.
James releases his hold on the goon as soon as he goes floppy, but he could easily regain consciousness.
Virgil has set up an impressive monitoring of James's vitals but fails to check his blood pressure.
At the airport, James looks at the policemen with insistence making himself look very suspicious.